This is the polymer mesh in Rhombic shape used in advance composites industry. It is laid flat through- out the mould surface to ensure the even flow of resin throughout the mould surface. It is used under high vacuum and can with stand high negative pressure. It is generally used in green color for better visual clarity of flow of the resin throughout the mould surface. After the resin is cured it is removed from the surface of the mould area.